I downloaded chapter 190 from this site.
It says "More like...shall we gang-rape her"
Inaba ask if they are always do stuff like that.
After they ask him if he doesn't want to come with them he says
"I don't want to get involved with a criminal group though"
He mentions nothing about the legality of it.
To me it sound more that he just doesn't want to do it together with them.
But he would rape her alone (if he would not be such a coward).
Although we can argue about that, it's clear to me.
Because of his answer. He didn't say "that's illegal" or "i'm not into raping".
And there is the word "though" at the end of the sentence.
For me that all points in the same direction.
"For Feanor was made the mightiest in all parts of body and mind, in valour, in endurance, in beauty, in understanding, in skill, in strength and subtlety alike, of all the Children of Illuvatar, and a bright flame was in him"